As an operating system, FreeBSD is generally regarded as reliable and robust, and of the operating systems that accurately report uptime remotely,[2] FreeBSD is the most common free operating system listed in Netcraft’s list[3] of the 50 web servers with the longest uptime. A long uptime also indicates that no crashes have occurred and that no kernel updates have been deemed necessary, as installing a new kernel requires a reboot and resets the uptime counter of the system.